A model and an algebra for semi-structured and full-text queries

The need for a convergence between semi-structured data management and Information Retrieval techniques is manifest to the scientific community. In order to fulfil this growing request, W3C has recently proposed XQuery Full Text, an IR-oriented extension of XQuery. However, the issue of query optimization requires the study of important properties like query equivalence and containment; to this aim, a formal representation of document and queries is needed. The goal of this thesis is to establish such formal background. We define a data model for XML documents and propose an algebra able to represent most of XQuery Full-Text expressions. We show how an XQuery Full-Text expression can be translated into an algebraic expression and how an algebraic expression can be optimized.

La salute detenuta: tra diritto e sicurezza”. Un’ indagine nella Casa Circondariale di Rimini.

The survey approachs the issue of health and the problem of its effective protection in a context of deprivation of liberty and coercion, which is the prison. The theoretical reflection born from the reform of the Legislative Decree 230/99 which marked the transition from an employee by the Prison Health within prison a fully integrated in the National Health Service. The comparison between an institution of health promotion and institution of punishment which may operate on the same subject held produces multiple attrits, making their relationship problematic. The work shows the daily difficulties in the management of prison health within the institution, physician-patient between different health care roles, and between the latter and prison workers. The coexistence, in fact, is not always harmonious though quite often it is common sense and the willingness of operators to reduce barriers: overcrowding, limited resources and insufficient staff make the application of the rule and therefore the right to goal a difficult to be pursued. It is designed for a scheme of semi-structured interview essay is divided into 3 sections covering: "staff and its functions", "health reform" and "health of the prisoner"; questions were directed to doctors, nurses and psychologists engaged inside the prison of Rimini with the specific aim of examining the ambivalent relationship between the demand for health care in prisons and the need for security and a clear - albeit partial - point of view. We tried to reconstruct the situation of prison health care through the perception of prison operators, capturing the problematic issues that deal on both issues is instrumental to the experience of persons detained by analyzing, in terms of operators , what happens inside of a prison institution in everyday health care.

Italian higher education students’ perspectives on internationalization at home and their identity as English as lingua franca users

This study aims to explore the Italian students’ perspectives on using English in English-medium instruction (EMI) programs in light of the practices of internationalization at home (IaH) at the University of Bologna (UNIBO) in Italy and further investigates whether these attitudes affect their language identity as English as lingua franca (ELF) users. To serve this aim, a mixed-method approach was adopted to collect quantitative and in-depth qualitative data in two phases through an online survey and a semi-structured interview. A total number of 78 Italian students participated in the survey, out of which 14 participants were interviewed. The findings of the online survey indicated that most participants (92%) held a positive perspective toward the use of English in EMI programs and the findings from the interviews were in line with the results of the survey. However, the purpose of the interviews was to explore the participants’ views on their language identity as ELF users. Thematic analysis of the interviews revealed that students experience emotional, cognitive, and social transitions in EMI programs in response to their shift from a non-EMI to an EMI academic setting. Overall, all the above-mentioned transitions were positive and could lead to personal development. However, it can be concluded that the EMI context provides few opportunities for the emergence of significant new subject positions mediated by English in this study. The focus on students’ perspectives on the use of English in EMI programs can contribute to the improvement in language policy planning and internationalized curriculum design by policymakers and alleviate tensions over the controversial issue of the Englishization of higher education by considering how EMI students perceive their use of English as ELF users not superior standard English users.

Lo sviluppo di disturbi psichiatrici in pazienti hcv+ sottoposti a terapia antivirale: L'impatto dei nuovi farmaci

Introduzione:l’interferone (IFN) usato per l’eradicazione del virus dell’Epatite C, induce effetti collaterali anche riferibili alla sfera psichica. I dati sugli eventi avversi di tipo psichiatrico dei nuovi farmaci antivirali (DAA) sono limitati. Lo scopo di questo studio è di valutare lo sviluppo di effetti collaterali di tipo psichiatrico in corso di due distinti schemi di trattamento: IFN-peghilato e ribavirina [terapia duplice (standard o SOC)]; DAA in associazione a IFN-peghilato e ribavirina (terapia triplice). Metodi: pazienti HCV+ consecutivi seguiti presso l’Ambulatorio delle Epatiti Croniche della Semeiotica Medica del Dipartimento di Scienze Mediche e Chirurgiche dell’Università di Bologna in procinto di intraprendere un trattamento antivirale a base di IFN, sottoposti ad esame psicodiagnostico composto da intervista clinica semistrutturata e test autosomministrati: BDI, STAXI-2, Hamilton Anxiety Scale, MMPI – 2. Risultati: Sono stati arruolati 84 pazienti, 57/84 (67.9%) nel gruppo in triplice e 27/84 nel gruppo SOC. Quasi tutti i pazienti arruolati hanno eseguito l’intervista clinica iniziale (82/84; 97.6%), mentre scarsa è stata l’aderenza ai test (valori missing>50%). Ad eccezione dell’ansia, la prevalenza di tutti gli altri disturbi (irritabilità, astenia, disfunzioni neurocognitive, dissonnia) aumentava in corso di trattamento. In corso di terapia antivirale 43/84 (51.2%) hanno avuto bisogno di usufruire del servizio di consulenza psichiatrica e 48/84 (57.1%) hanno ricevuto una psicofarmacoterapia di supporto, senza differenze significative fra i due gruppi di trattamento. Conclusioni : uno degli elementi più salienti dello studio è stata la scarsa aderenza ai test psicodiagnostici, nonostante l’elevata prevalenza di sintomi psichiatrici. I risultati di questo studio oltre ad evidenziare l’importanza dei sintomi psichiatrici in corso di trattamento e la rilevanza della consulenza psicologica e psichiatrica per consentire di portare a termine il ciclo terapeutico previsto (migliorandone l’efficacia), ha anche dimostrato che occorre ripensare gli strumenti diagnostici adattandoli probabilmente a questo specifico target.